The Washer,recessed, cataloged under National Stock Number 5310-00-209-3480, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ambac International Corporation Div Ambac International. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-209-3480 |
| Primary Part Number | WA1241 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-S-133 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.604 INCHES MINIMUM AND 0.614 INCHES MAXIMUM IN |
| Recess Depth | 0.044 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN |
| Material | STEEL COMP 1118 OVERALL |
| Hole Diameter | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| WA1241 PRIMARY | Ambac International Corporation Div Ambac International (USA) |
NSN 5310-00-209-3480 is a Washer,recessed, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-3480 has 1 manufacturer part number on file: WA1241 (Ambac International Corporation Div Ambac International).
Key specifications for WA1241: Overall Height: 0.172 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN; Style Designator: RECESSED; Material Document and Classification: QQ-S-133 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.604 INCHES MINIMUM AND 0.614 INCHES MAXIMUM IN. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.